Have recently been using this on iPhone and honestly, it's a game changer for online shopping (or even in-store when you consider price-matching).
Previously I hadn’t really engaged with iPhone extensions, but now I can visit a product and it pops up with a bit of a nudge and a wink, keeping things simple and pointing me to lower prices... it kind of feels like cheating.
I don’t even shop -that- much, but the savings are already adding up.
It’s a no-brainer, fight the power